Why is groundwater less contaminated than surface water?
If we compare an organic pollutant in groundwater to one in surface water water, groundwater has fewer microbes to digest organic pollutants, less oxygen no sunlight and surface from which organic pollutant can evaporate. Especially in slow moving groundwater, pollutants can persist indefinitely.
Why is underground water free from germs or bacteria?
As water moves down through layers of soil, disease-causing germs such as bacteria and viruses are filtered out. For this reason, groundwater often produces drinking water that does not need to have chlorine added to kill germs. Wells close to streams or lakes, however, might not produce germ-free water.
Does ground water have bacteria?
Health effects of microbes in ground water. Although there are some bacteria in all ground waters, and in general they carry out beneficial processes, some bacteria or other microorganisms (e.g., protozoa, viruses) may cause disease in humans. A few microorganisms (called pathogens) can cause disease in humans.
What bacteria is found in air?
The most common genera of bacteria found in indoor air are Staphylococci, Bacilli, and Clostridium [5]. MRSA (methicillin-resistant Staphylococcus aureus) and gentamicin-resistant Gram-negative bacteria are found to be serious nowadays [1].
What are some harmless bacteria?
Types of Probiotics and What They Do
- Lactobacillus. In the body, lactobacillus bacteria are normally found in the digestive, urinary, and genital systems.
- Bifidobacteria. Bifidobacteria make up most of the “good” bacteria living in the gut.
- Streptococcus thermophilus.
- Saccharomyces boulardii.
Can good bacteria turn into bad bacteria?
Some are harmless, some are beneficial and some, of course, cause disease. Others, such as the common bacterium Streptococcus pneumoniae, defy categorization. They are turncoats, with the ability to suddenly switch from good to bad.
What can stop the good bacteria from growing?
Avoid Animal Products. Red meat, high-fat dairy products, and fried foods all reduce the growth of healthy bacteria and enhance the growth of “bad” bacteria linked to chronic disease.